3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $walk = function( $item, $key, $parent_key = '' ) use ( &$output, &$walk ) { is_array( $item ) ? array_walk( $item, $walk, $key ) : $output[] = http_build_query( array( $parent_key ?: $key => $item ) ); }; $array = array( 'order_source' => array('google','facebook'), 'order_medium' => 'google-text' ); array_walk( $array, $walk ); echo implode( '&', $output ); // order_source=google&order_source=facebook&order_medium=google-text
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
order_source=google&order_source=facebook&order_medium=google-text
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/FMRZi on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/FMRZi on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/FMRZi on line 2
Process exited with code 255.